JP7060810B2 - Light emitting device and manufacturing method of light emitting device - Google Patents

Light emitting device and manufacturing method of light emitting device Download PDF

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JP7060810B2
JP7060810B2 JP2019208358A JP2019208358A JP7060810B2 JP 7060810 B2 JP7060810 B2 JP 7060810B2 JP 2019208358 A JP2019208358 A JP 2019208358A JP 2019208358 A JP2019208358 A JP 2019208358A JP 7060810 B2 JP7060810 B2 JP 7060810B2
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light emitting
translucent member
emitting device
emitting element
main body
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JP2021082691A (en
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博凡 佐々
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Nichia Corp
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Nichia Corp
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/005—Processes
    • H01L33/0095—Post-treatment of devices, e.g. annealing, recrystallisation or short-circuit elimination
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/50—Wavelength conversion elements
    • H01L33/505—Wavelength conversion elements characterised by the shape, e.g. plate or foil
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52—Encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0041—Processes relating to semiconductor body packages relating to wavelength conversion elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/005—Processes relating to semiconductor body packages relating to encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L2933/00—Details relating to devices covered by the group H01L33/00 but not provided for in its subgroups
    • H01L2933/0008—Processes
    • H01L2933/0033—Processes relating to semiconductor body packages
    • H01L2933/0058—Processes relating to semiconductor body packages relating to optical field-shaping elements

Description

本開示は、発光装置および発光装置の製造方法に関する。 The present disclosure relates to a light emitting device and a method for manufacturing the light emitting device.

従来、半導体発光素子と、中央部の厚みが外周周辺の厚みと異なる蛍光体板と、光反射部材と、を備える発光装置が知られている（特許文献１参照）。 Conventionally, a light emitting device including a semiconductor light emitting device, a phosphor plate having a thickness at the center portion different from that at the periphery of the outer periphery, and a light reflecting member is known (see Patent Document 1).

特開２０１０－２７２８４７号公報Japanese Unexamined Patent Publication No. 2010-272847

車両用途等の光源に用いる発光装置には、より高輝度な発光装置が求められている。 A light emitting device with higher brightness is required for a light emitting device used as a light source for vehicle applications and the like.

本開示に係る実施形態は、より高輝度な発光装置および発光装置の製造方法を提供することを課題とする。 It is an object of the present embodiment to provide a light emitting device having higher brightness and a method for manufacturing the light emitting device.

本開示の実施形態に係る発光装置は、発光素子と、矩形の上面と前記発光素子に接合される下面とを有する透光性部材と、前記透光性部材の前記上面を露出させて前記透光性部材および前記発光素子の側面を被覆する被覆部材と、を備え、前記透光性部材は、前記矩形の上面を形成する本体部と、前記本体部の周辺において前記本体部より厚みが薄い周辺部と、を有し、前記周辺部は、前記矩形の角部に対応する位置であって前記周辺部の側面に前記本体部側に凹んだ凹部を有する。 The light emitting device according to the embodiment of the present disclosure has a light emitting element, a translucent member having a rectangular upper surface and a lower surface joined to the light emitting element, and the upper surface of the translucent member is exposed to expose the translucent member. The light-transmitting member includes a light-emitting member and a covering member that covers the side surface of the light-emitting element, and the translucent member is thinner than the main body portion in the vicinity of the main body portion forming the upper surface of the rectangle and the main body portion. The peripheral portion has a peripheral portion, and the peripheral portion has a recessed portion on the side surface of the peripheral portion at a position corresponding to the corner portion of the rectangular portion and is recessed toward the main body portion.

本開示の実施形態に係る発光装置の製造方法は、矩形の上面を形成する本体部と、前記本体部の周辺において前記本体部より厚みが薄い周辺部と、を有し、前記周辺部の側面が、前記矩形の角部に対応する位置に形成される凹部を有する透光性部材を準備する工程と、発光素子の上面に前記透光性部材の下面を接合する工程と、前記透光性部材の前記上面を露出させて前記透光性部材の前記凹部、前記発光素子の側面を被覆するように被覆部材を形成する工程と、を含む。 The method for manufacturing a light emitting device according to an embodiment of the present disclosure includes a main body portion forming a rectangular upper surface and a peripheral portion having a thickness thinner than the main body portion around the main body portion, and a side surface of the peripheral portion. However, a step of preparing a translucent member having a recess formed at a position corresponding to a corner portion of the rectangle, a step of joining the lower surface of the translucent member to the upper surface of the light emitting element, and the translucency. The present invention comprises a step of exposing the upper surface of the member to form a covering member so as to cover the recess of the translucent member and the side surface of the light emitting element.

本開示に係る実施形態によれば、より高輝度な発光装置および発光装置の製造方法を提供することができる。 According to the embodiment according to the present disclosure, it is possible to provide a light emitting device having higher brightness and a method for manufacturing the light emitting device.

第１実施形態に係る発光装置を模式的に示す平面図である。It is a top view which shows typically the light emitting device which concerns on 1st Embodiment. 図１のＩＩ－ＩＩ線における発光装置の断面を模式的に示す断面図である。It is sectional drawing which shows typically the cross section of the light emitting device in line II-II of FIG. 図１のＩＩＩ－ＩＩＩ線における発光装置の断面を模式的に示す断面図である。It is sectional drawing which shows typically the cross section of the light emitting device in line III-III of FIG. 第１実施形態に係る発光装置の透光性部材を模式的に示す斜視図である。It is a perspective view which shows typically the translucent member of the light emitting device which concerns on 1st Embodiment. 図４の領域Ｒ１における鍔部の表面を模式的に示す説明図である。It is explanatory drawing which shows typically the surface of the flange part in the region R1 of FIG. 図４の領域Ｒ２における鍔部の表面を模式的に示す説明図である。It is explanatory drawing which shows typically the surface of the flange part in the region R2 of FIG. 図４のＶＩＩ－ＶＩＩ線における透光性部材の断面を模式的に示す断面図である。It is sectional drawing which shows typically the cross section of the translucent member in the VII-VII line of FIG. 図４の透光性部材を模式的に示す平面図である。It is a top view schematically showing the translucent member of FIG. 第１実施形態に係る発光装置の製造方法において基板に発光素子を実装した状態を模式的に示す説明図である。It is explanatory drawing which shows typically the state which the light emitting element is mounted on the substrate in the manufacturing method of the light emitting device which concerns on 1st Embodiment. 第１実施形態に係る発光装置の製造方法において発光素子上に接着材を塗布した状態を模式的に示す説明図である。It is explanatory drawing which shows typically the state which the adhesive material was applied on the light emitting element in the manufacturing method of the light emitting device which concerns on 1st Embodiment. 第１実施形態に係る発光装置の製造方法において発光素子上に接着材を介して透光性部材を接合した状態を模式的に示す説明図である。It is explanatory drawing which shows typically the state which the translucent member is bonded on the light emitting element with the adhesive material in the manufacturing method of the light emitting device which concerns on 1st Embodiment. 第１実施形態に係る発光装置の製造方法において透光性部材の上面を除く表面および発光素子の周縁に光反射性部材を設けた状態を模式的に示す説明図である。It is explanatory drawing which shows typically the state which provided the light-reflecting member on the surface except the upper surface of the translucent member and the peripheral edge of a light-emitting element in the manufacturing method of the light emitting device which concerns on 1st Embodiment. 第１実施形態に係る発光装置の製造方法において用いる透光性基板の一例を模式的に示す説明図である。It is explanatory drawing which shows typically an example of the translucent substrate used in the manufacturing method of the light emitting apparatus which concerns on 1st Embodiment. 第１実施形態に係る発光装置の製造方法においてレーザ加工工程を模式的に示す説明図である。It is explanatory drawing which shows typically the laser processing process in the manufacturing method of the light emitting device which concerns on 1st Embodiment. 図１１のＸＩＩ－ＸＩＩ線における透光性基板の断面を模式的に示す断面図である。It is sectional drawing which shows typically the cross section of the translucent substrate in the XII-XII line of FIG. 変形例に係る発光装置に使用する透光性部材を示す断面図である。It is sectional drawing which shows the translucent member used for the light emitting device which concerns on a modification.

実施形態を、以下に図面を参照しながら説明する。ただし、以下に示す形態は、本実施形態の技術思想を具現化するための発光装置および発光装置の製造方法を例示するものであって、以下に限定するものではない。また、実施の形態に記載されている構成部品の寸法、材質、形状、その相対的配置等は、特定的な記載がない限り、本発明の範囲をそれのみに限定する趣旨ではなく、単なる例示に過ぎない。なお、各図面が示す部材の大きさや位置関係等は、説明を明確にするために誇張していることがある。 The embodiments will be described below with reference to the drawings. However, the embodiments shown below exemplify the light emitting device and the manufacturing method of the light emitting device for embodying the technical idea of the present embodiment, and are not limited to the following. Further, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments are not intended to limit the scope of the present invention to the specific description, but are merely examples. It's just that. The size and positional relationship of the members shown in each drawing may be exaggerated for the sake of clarity.

＜第１実施形態＞
図１は、第１実施形態に係る発光装置を模式的に示す平面図である。図２は、図１のＩＩ－ＩＩ線における発光装置の断面を模式的に示す断面図である。図３は、図１のＩＩＩ－ＩＩＩ線における発光装置の断面を模式的に示す断面図である。図４は、第１実施形態に係る発光装置の透光性部材を模式的に示す斜視図である。図５は、図４の領域Ｒ１における鍔部の表面を模式的に示す説明図である。図６は、図４の領域Ｒ２における鍔部の表面を模式的に示す説明図である。図７は、図４のＶＩＩ－ＶＩＩ線における透光性部材の断面を模式的に示す断面図である。図８は、図４の透光性部材を模式的に示す平面図である。 <First Embodiment>
FIG. 1 is a plan view schematically showing a light emitting device according to the first embodiment. FIG. 2 is a cross-sectional view schematically showing a cross section of the light emitting device in line II-II of FIG. FIG. 3 is a cross-sectional view schematically showing a cross section of the light emitting device in lines III-III of FIG. FIG. 4 is a perspective view schematically showing a translucent member of the light emitting device according to the first embodiment. FIG. 5 is an explanatory diagram schematically showing the surface of the collar portion in the region R1 of FIG. FIG. 6 is an explanatory diagram schematically showing the surface of the collar portion in the region R2 of FIG. FIG. 7 is a cross-sectional view schematically showing a cross section of the translucent member in the line VII-VII of FIG. FIG. 8 is a plan view schematically showing the translucent member of FIG.

［発光装置］
発光装置１は、図１乃至図３に示すように、発光素子１０と、矩形の上面２２と発光素子１０に接合される下面２１とを有する透光性部材２０と、透光性部材２０の上面２２を露出させて透光性部材２０および発光素子１０の側面１２を被覆する被覆部材４０と、を備えている。そして、透光性部材２０は、図４及び図７に示すように、矩形の上面２２を形成する本体部２４と、本体部２４の周辺において本体部２４より厚みが薄い周辺部２５と、を有している。さらに、周辺部２５は、矩形の角部５に対応する位置であって周辺部２５の側面に本体部２４側に凹んだ凹部９を有している。
以下、発光装置１の各部の構成について順次に詳細に説明する。 [Light emitting device]
As shown in FIGS. 1 to 3, the light emitting device 1 comprises a light emitting element 10, a translucent member 20 having a rectangular upper surface 22 and a lower surface 21 joined to the light emitting element 10, and a translucent member 20. It includes a translucent member 20 that exposes the upper surface 22 and a covering member 40 that covers the side surface 12 of the light emitting element 10. Then, as shown in FIGS. 4 and 7, the translucent member 20 has a main body portion 24 forming a rectangular upper surface 22 and a peripheral portion 25 having a thickness thinner than the main body portion 24 around the main body portion 24. Have. Further, the peripheral portion 25 has a concave portion 9 recessed on the main body portion 24 side on the side surface of the peripheral portion 25 at a position corresponding to the rectangular corner portion 5.
Hereinafter, the configuration of each part of the light emitting device 1 will be described in detail in order.

［発光素子］
発光素子１０は、発光ダイオードやレーザダイオード等を用いるのが好ましい。また、発光素子１０は、任意の波長のものを選択することができる。例えば、青色、緑色の発光素子としては、窒化物系半導体（ＩｎXＡｌYＧａ1-X-YＮ、０≦Ｘ、０≦Ｙ、Ｘ＋Ｙ≦１）、ＧａＰを用いたものを用いることができる。さらに、赤色の発光素子としては、窒化物系半導体素子の他にもＧａＡｌＡｓ、ＡｌＩｎＧａＰ等を用いることができる。なお、発光素子１０は、前記した以外の材料からなる半導体発光素子を用いることもできる。発光素子１０は、組成や発光色、大きさや、個数等は目的に応じて適宜選択することができる。発光素子１０は、同一面側に正負の電極を有するものが好ましい。これにより、発光素子１０を基板５０上にフリップチップ実装することができる。この場合、正負の電極が形成された面と対向する面が、発光素子１０の主な光取り出し面となる。また、発光素子１０を基板５０上にフェイスアップ実装する場合は、正負の電極が形成された面が発光素子１０の主な光取り出し面となる。発光素子１０は、例えば、バンプ等の接合部材を介して基板５０と電気的に接続される。なお、図１および図３に示すように、発光素子１０および透光性部材２０を発光装置１の一長手方向に偏って配置することで、ツェナーダイオード等の保護素子７０を配置することができる。なお、発光素子として、上下電極型の発光素子を用いてもよい。
発光素子１０は、上面視において、四角形、六角形等の多角形、円又は楕円等、種々の形状とすることができるが、四角形であることが好ましく、矩形であることがより好ましい。 [Light emitting element]
As the light emitting element 10, it is preferable to use a light emitting diode, a laser diode, or the like. Further, the light emitting element 10 can be selected to have an arbitrary wavelength. For example, as the blue and green light emitting elements, those using a nitride semiconductor (In X Al Y Ga 1-XY N, 0 ≦ X, 0 ≦ Y, X + Y ≦ 1) and GaP can be used. Further, as the red light emitting device, GaAlAs, AlInGaP and the like can be used in addition to the nitride semiconductor device. As the light emitting element 10, a semiconductor light emitting device made of a material other than the above can also be used. The composition, emission color, size, number, and the like of the light emitting element 10 can be appropriately selected according to the purpose. The light emitting element 10 preferably has positive and negative electrodes on the same surface side. As a result, the light emitting element 10 can be flip-chip mounted on the substrate 50. In this case, the surface facing the surface on which the positive and negative electrodes are formed becomes the main light extraction surface of the light emitting element 10. When the light emitting element 10 is face-up mounted on the substrate 50, the surface on which the positive and negative electrodes are formed becomes the main light extraction surface of the light emitting element 10. The light emitting element 10 is electrically connected to the substrate 50 via, for example, a joining member such as a bump. As shown in FIGS. 1 and 3, by arranging the light emitting element 10 and the translucent member 20 in a biased manner in one longitudinal direction of the light emitting device 1, a protective element 70 such as a Zener diode can be arranged. .. As the light emitting element, an upper and lower electrode type light emitting element may be used.
The light emitting element 10 can have various shapes such as a quadrangle, a polygon such as a hexagon, a circle, or an ellipse in a top view, but a quadrangle is preferable, and a rectangle is more preferable.

［透光性部材］
透光性部材２０は、一枚の板状に形成されており、矩形の上面を形成する本体部と、本体部の周辺において本体部より厚みが薄い周辺部とを有する。また、透光性部材２０は、周辺部２５において上面の矩形の角部に対応する位置に、周辺部２５から本体部２４に向かって凹んだ凹部９を有している。図２および図３に示すように、透光性部材２０は、断面視形状が、凸形状に形成されている。そして、透光性部材２０は、発光素子１０の上面１１と接合する下面２１と、平面視において下面２１に内包される上面２２と、を有する。さらに、透光性部材２０は、上面２２と下面２１との間の側面として、上面２２の矩形の各辺に対応する位置に設けられ、上面から下面に向かって拡がるように傾斜する傾斜側面３２と、傾斜側面３２に連なり、下面２１に垂直な垂直側面３１と、凹部９を構成する湾曲側面２６と、を有する。 [Translucent member]
The translucent member 20 is formed in the shape of a single plate, and has a main body portion forming a rectangular upper surface and a peripheral portion around the main body portion that is thinner than the main body portion. Further, the translucent member 20 has a recess 9 recessed from the peripheral portion 25 toward the main body portion 24 at a position corresponding to a rectangular corner portion on the upper surface of the peripheral portion 25. As shown in FIGS. 2 and 3, the translucent member 20 has a convex cross-sectional shape. The translucent member 20 has a lower surface 21 joined to the upper surface 11 of the light emitting element 10 and an upper surface 22 included in the lower surface 21 in a plan view. Further, the translucent member 20 is provided at a position corresponding to each side of the rectangle of the upper surface 22 as a side surface between the upper surface 22 and the lower surface 21, and the inclined side surface 32 is inclined so as to expand from the upper surface to the lower surface. It has a vertical side surface 31 which is connected to the inclined side surface 32 and is perpendicular to the lower surface 21, and a curved side surface 26 which constitutes the recess 9.

透光性部材２０の下面２１は、発光素子１０からの光が入射される面である。透光性部材２０の下面２１は、発光素子１０の上面１１の面積よりも大きな面積となるように形成されている。これにより、発光素子１０から照射される光をロスなく透光性部材２０へと入射することができる。また、透光性部材２０の下面２１は上面２２と略平行で、その表面は略平坦になるように形成されている。 The lower surface 21 of the translucent member 20 is a surface on which the light from the light emitting element 10 is incident. The lower surface 21 of the translucent member 20 is formed so as to have an area larger than the area of the upper surface 11 of the light emitting element 10. As a result, the light emitted from the light emitting element 10 can be incident on the translucent member 20 without loss. Further, the lower surface 21 of the translucent member 20 is substantially parallel to the upper surface 22, and the surface thereof is formed to be substantially flat.

透光性部材２０の上面２２は、発光装置１の発光面として、下面２１から入射した光を外部に放出する。この上面２２の面積は、下面２１の面積よりも小さくなるように形成されている。透光性部材２０は、上面２２が被覆部材４０に覆われることなく被覆部材４０から露出するように配置される。そして、平面視において上面２２と下面２１とは略相似形状または類似形状であり、透光性部材２０の上面２２と下面２１とはそれぞれの重心位置が重なるように形成されていることが好ましい。これにより、発光装置１の発光面（つまり透光性部材２０の上面２２）における輝度むらを抑制することができる。 The upper surface 22 of the translucent member 20 emits light incident from the lower surface 21 to the outside as a light emitting surface of the light emitting device 1. The area of the upper surface 22 is formed to be smaller than the area of the lower surface 21. The translucent member 20 is arranged so that the upper surface 22 is exposed from the covering member 40 without being covered by the covering member 40. It is preferable that the upper surface 22 and the lower surface 21 have substantially similar or similar shapes in a plan view, and the upper surface 22 and the lower surface 21 of the translucent member 20 are formed so that their respective center of gravity positions overlap. As a result, it is possible to suppress uneven brightness on the light emitting surface of the light emitting device 1 (that is, the upper surface 22 of the translucent member 20).

図７および図８に示すように、透光性部材２０の周辺部２５は、本体部２４側から外縁７まで徐々に薄くなるように形成されている。言い換えると、透光性部材２０の下面２１から上面２２までの高さは、垂直側面３１において最も小さく、傾斜側面３２に沿って本体部２４に向かって徐々に大きくなるように形成されている。 As shown in FIGS. 7 and 8, the peripheral portion 25 of the translucent member 20 is formed so as to gradually become thinner from the main body portion 24 side to the outer edge 7. In other words, the height from the lower surface 21 to the upper surface 22 of the translucent member 20 is the smallest on the vertical side surface 31, and is formed so as to gradually increase toward the main body portion 24 along the inclined side surface 32.

透光性部材２０の垂直側面３１は、透光性部材２０の下面２１及び上面２２に対して略垂直に形成されている。これにより、発光装置１の製造時において被覆部材４０の上面２２への這い上がりを抑制することができる。垂直側面３１は、被覆部材４０の這い上がりを抑制できる角度として、例えば、上面２２に対して９０度プラスマイナス５度の範囲とし、本明細書中ではこの範囲を略垂直としている。 The vertical side surface 31 of the translucent member 20 is formed substantially perpendicular to the lower surface 21 and the upper surface 22 of the translucent member 20. As a result, it is possible to suppress the creeping up of the covering member 40 to the upper surface 22 at the time of manufacturing the light emitting device 1. The vertical side surface 31 has a range of 90 degrees plus or minus 5 degrees with respect to the upper surface 22 as an angle capable of suppressing the creeping up of the covering member 40, and this range is substantially vertical in the present specification.

傾斜側面３２は、ここでは、透光性部材２０の上面２２から下面２１に向かって拡がるように傾斜する傾斜曲面として形成されている。また、傾斜側面３２が傾斜する角度は、上面２２との境界付近で上面２２に対して略垂直となる。このように、傾斜側面３２が傾斜曲面であることで、発光素子１０からの光を、効率よく透光性部材２０の上面２２に向けて反射することができ、輝度の高い発光装置１とすることができる。また、周辺部２５の厚みが徐々に変化することにより、透光性部材２０の構造的な強度を向上することができる。そして、傾斜側面３２の傾斜角度が上面２２との境界付近で上面２２に対して略垂直となることで、透光性部材２０の上面２２を発光装置１の発光面とした際に、発光装置１の発光面（つまり透光性部材２０の上面２２）と発光面を囲む被覆部材４０の上面との境界を明瞭なものとすることができる。 The inclined side surface 32 is formed here as an inclined curved surface that is inclined so as to expand from the upper surface 22 of the translucent member 20 toward the lower surface 21. Further, the angle at which the inclined side surface 32 is inclined is substantially perpendicular to the upper surface 22 near the boundary with the upper surface 22. As described above, since the inclined side surface 32 is an inclined curved surface, the light from the light emitting element 10 can be efficiently reflected toward the upper surface 22 of the translucent member 20, and the light emitting device 1 having high brightness is obtained. be able to. Further, by gradually changing the thickness of the peripheral portion 25, the structural strength of the translucent member 20 can be improved. Then, the inclination angle of the inclined side surface 32 becomes substantially perpendicular to the upper surface 22 near the boundary with the upper surface 22, so that when the upper surface 22 of the translucent member 20 is used as the light emitting surface of the light emitting device 1, the light emitting device is used. The boundary between the light emitting surface of 1 (that is, the upper surface 22 of the translucent member 20) and the upper surface of the covering member 40 surrounding the light emitting surface can be made clear.

図８に示すように、透光性部材２０は矩形の上面を有し、矩形の角部に対応する位置であって周辺部２５の側面に本体部２４側に凹んだ凹部９を有する。凹部９は、平面視において湾曲した形状となる湾曲側面２６を備える。湾曲側面２６は、周辺部２５の傾斜側面３２及び垂直側面３１と上面２２及び下面２１との境界に対応して外形が平面視において円弧状に湾曲した部位である。 As shown in FIG. 8, the translucent member 20 has a rectangular upper surface, and has a recess 9 recessed on the main body 24 side on the side surface of the peripheral portion 25 at a position corresponding to the corner portion of the rectangle. The recess 9 includes a curved side surface 26 having a curved shape in a plan view. The curved side surface 26 is a portion whose outer shape is curved in an arc shape in a plan view corresponding to the boundary between the inclined side surface 32 and the vertical side surface 31 of the peripheral portion 25 and the upper surface 22 and the lower surface 21.

図４、図７および図８に示すように、透光性部材２０の周辺部２５は、凹部９を介して矩形の各辺３に沿ってそれぞれ形成される鍔部３０を有する。
鍔部３０は、平面視において透光性部材２０の上面２２の各辺から側方に突出するように形成され、ここでは上面２２の矩形の辺と同数となる４か所に形成されている。鍔部３０は、平面視において略矩形状である。鍔部３０の下面は周辺部２５の下面として、本体部２４の下面とともに透光性部材２０の下面２１を構成している。鍔部３０は、垂直側面３１と傾斜側面３２と湾曲側面２６とを有する。垂直側面３１と傾斜側面３２の両端は、周辺部２５の湾曲側面２６に隣接している。 As shown in FIGS. 4, 7 and 8, the peripheral portion 25 of the translucent member 20 has a flange portion 30 formed along each side 3 of the rectangle via the recess 9.
The flange portion 30 is formed so as to project laterally from each side of the upper surface 22 of the translucent member 20 in a plan view, and is formed at four locations having the same number as the rectangular sides of the upper surface 22 here. .. The collar portion 30 has a substantially rectangular shape in a plan view. The lower surface of the flange portion 30 is the lower surface of the peripheral portion 25, and together with the lower surface of the main body portion 24, constitutes the lower surface 21 of the translucent member 20. The flange portion 30 has a vertical side surface 31, an inclined side surface 32, and a curved side surface 26. Both ends of the vertical side surface 31 and the inclined side surface 32 are adjacent to the curved side surface 26 of the peripheral portion 25.

透光性部材２０は、周辺部２５の表面に微細な縞状の凹凸が上面２２から下面２１に向かって形成されている。この微細な縞状の凹凸は、透光性部材２０の加工にパルスレーザを用いることにより形成することができる。ここで、縞状の凹凸は、少なくとも傾斜側面３２に形成されていればよいが、さらに、湾曲側面２６に形成されていてもよい。また、同様に、透光性部材２０の垂直側面３１はその表面に微細な縞状の凹凸が形成されていてもよい。 In the translucent member 20, fine striped irregularities are formed on the surface of the peripheral portion 25 from the upper surface 22 toward the lower surface 21. The fine striped unevenness can be formed by using a pulse laser for processing the translucent member 20. Here, the striped unevenness may be formed at least on the inclined side surface 32, but may be further formed on the curved side surface 26. Similarly, the vertical side surface 31 of the translucent member 20 may have fine striped irregularities formed on its surface.

傾斜側面３２と、透光性部材２０の上面２２との境界の領域Ｒ１には、図５に拡大して示すように、上面２２から下面２１に向かう方向の多数の筋が、上面２２を形成する矩形の辺に沿って形成されていてもよい。つまり、領域Ｒ１において、傾斜側面３２に、透光性部材２０の上面２２を形成する矩形の辺に沿って縞状の凹凸８４が形成されている。この縞状の凹凸８４は、透光性部材２０の材料に対してレーザ装置からパルスレーザを照射しつつレーザスポットを直線的に移動させるレーザ加工を行うことで形成することができる。レーザスポットの移動によって、レーザのビーム径に対応した孔径の溝同士が重なり合う。したがって、縞状の凹凸８４の周期は、ビーム径よりも小さくなっている。 As shown in an enlarged view in FIG. 5, a large number of streaks in the direction from the upper surface 22 to the lower surface 21 form the upper surface 22 in the region R1 at the boundary between the inclined side surface 32 and the upper surface 22 of the translucent member 20. It may be formed along the sides of the rectangular shape. That is, in the region R1, striped unevenness 84 is formed on the inclined side surface 32 along the rectangular side forming the upper surface 22 of the translucent member 20. The striped unevenness 84 can be formed by performing laser processing to linearly move the laser spot while irradiating the material of the translucent member 20 with a pulse laser from the laser device. Due to the movement of the laser spot, the grooves having a hole diameter corresponding to the beam diameter of the laser overlap each other. Therefore, the period of the striped unevenness 84 is smaller than the beam diameter.

また、垂直側面３１に近い傾斜側面３２の領域Ｒ２には、図６に拡大して示すように、レーザ加工を行うことで形成された痕跡が形成されている。この領域Ｒ２では、特に、上面２２を形成する矩形の辺に沿う方向の筋状の痕跡が目立っている。なお、図５および図６は、説明のためレーザ加工の痕跡を強調して示している。透光性部材２０の周辺部２５の表面に縞状の凹凸等が形成されていることで、後記する被覆部材４０と透光性部材２０の周辺部２５とが強固に密着した発光装置１となる。 Further, as shown in an enlarged manner in FIG. 6, a trace formed by laser processing is formed in the region R2 of the inclined side surface 32 close to the vertical side surface 31. In this region R2, in particular, streaky traces in the direction along the side of the rectangle forming the upper surface 22 are conspicuous. Note that FIGS. 5 and 6 emphasize the traces of laser machining for the sake of explanation. With the light emitting device 1 in which the covering member 40 described later and the peripheral portion 25 of the translucent member 20 are firmly adhered to each other due to the formation of striped irregularities or the like on the surface of the peripheral portion 25 of the translucent member 20. Become.

発光装置１は、図１に示すように透光性部材２０の鍔部において発光素子１０の中心から遠くに位置する角部を無くすように凹部９が形成されている。仮に透光性部材２０の鍔部において発光素子１０の中心から遠くに位置する角部が存在すると、透光性部材２０の下面２１から入射した光がこの角部近傍で反射を繰り返し減衰して外部に取り出しにくくなる。これに対して、発光装置１は、透光性部材２０の凹部９が形成されているので、反射を繰り返し減衰して外部に取り出せなかった光を有効に利用することができる。したがって、透光性部材２０の下面２１から入射した光のより多くが上面２２側に導光されやすくなり、輝度の高い発光装置１とすることができる。 As shown in FIG. 1, the light emitting device 1 is formed with a recess 9 in the flange portion of the translucent member 20 so as to eliminate a corner portion located far from the center of the light emitting element 10. If there is a corner portion of the flange portion of the translucent member 20 located far from the center of the light emitting element 10, the light incident from the lower surface 21 of the translucent member 20 repeatedly attenuates the reflection in the vicinity of this corner portion. It becomes difficult to take it out. On the other hand, since the light emitting device 1 is formed with the recess 9 of the translucent member 20, it is possible to effectively utilize the light that cannot be taken out to the outside by repeatedly attenuating the reflection. Therefore, more of the light incident from the lower surface 21 of the translucent member 20 is easily guided to the upper surface 22 side, and the light emitting device 1 having high brightness can be obtained.

透光性部材２０は、発光素子１０から出射される光を透過して外部に取り出すことが可能な材料で構成されている。透光性部材２０は、例えば、樹脂、ガラス、無機物等により形成することができる。透光性部材２０は、光拡散材や、発光素子１０から入射される光の少なくとも一部を波長変換可能な蛍光体を含有することができる。蛍光体を含有する透光性部材２０は、例えば、蛍光体の焼結体や、樹脂、ガラス、セラミックまたは他の無機物等に蛍光体粉末を含有させたものがあげられる。また、透光性部材２０は、樹脂、ガラス、セラミック等の成形体の表面に蛍光体を含有する層を形成したものでもよい。蛍光体の焼結体としては、蛍光体だけを焼結して形成したものでもよいし、蛍光体と焼結助剤との混合物を焼結して形成したものでもよい。蛍光体と焼結助剤との混合物を焼結する場合、焼結助剤としては、酸化ケイ素、酸化アルミニウム、または酸化チタン等の無機材料を用いることが好ましい。これにより、発光素子１０が高出力であったとしても、光や熱による焼結助剤の変色や変形を抑制することができる。 The translucent member 20 is made of a material capable of transmitting light emitted from the light emitting element 10 and taking it out to the outside. The translucent member 20 can be formed of, for example, a resin, glass, an inorganic substance, or the like. The translucent member 20 can contain a light diffusing material and a phosphor capable of wavelength-converting at least a part of the light incident from the light emitting element 10. Examples of the translucent member 20 containing a fluorescent substance include a sintered body of a fluorescent substance, and a resin, glass, ceramic, or other inorganic substance containing the fluorescent substance powder. Further, the translucent member 20 may have a layer containing a phosphor formed on the surface of a molded product such as resin, glass, or ceramic. The sintered body of the phosphor may be formed by sintering only the phosphor, or may be formed by sintering a mixture of the phosphor and the sintering aid. When sintering a mixture of a phosphor and a sintering aid, it is preferable to use an inorganic material such as silicon oxide, aluminum oxide, or titanium oxide as the sintering aid. As a result, even if the light emitting element 10 has a high output, it is possible to suppress discoloration and deformation of the sintering aid due to light or heat.

蛍光体としては、この分野で用いられる蛍光体を適宜選択することができる。青色発光素子または紫外線発光素子で励起可能な蛍光体としては、例えば、セリウムで賦活されたイットリウム・アルミニウム・ガーネット系蛍光体（ＹＡＧ：Ｃｅ）等を用いることができる。これらの蛍光体と、青色発光素子または紫外線発光素子と組み合わせることにより、様々な色の発光装置（例えば白色系の発光装置）を製造することができる。白色に発光可能な発光装置１とする場合、透光性部材２０に含有される蛍光体の種類、濃度によって白色となるように調整される。透光性部材２０に含有される蛍光体の濃度は、例えば、３０～８０質量％程度である。 As the fluorescent substance, a fluorescent substance used in this field can be appropriately selected. As the phosphor that can be excited by the blue light emitting element or the ultraviolet light emitting element, for example, a cerium-activated yttrium aluminum garnet-based phosphor (YAG: Ce) or the like can be used. By combining these phosphors with a blue light emitting element or an ultraviolet light emitting element, a light emitting device of various colors (for example, a white light emitting device) can be manufactured. In the case of the light emitting device 1 capable of emitting white light, the light emitting device 1 is adjusted to be white depending on the type and concentration of the phosphor contained in the translucent member 20. The concentration of the phosphor contained in the translucent member 20 is, for example, about 30 to 80% by mass.

［被覆部材］
被覆部材４０は、発光素子１０からの光を反射可能な部材により形成することができる。このように、発光素子１０から出射された光は、直接または被覆部材４０により反射されて透光性部材２０へと入射し、透光性部材２０内を通過し、発光装置１の発光面である透光性部材２０の上面２２から、外部へと出射される。 [Coating member]
The covering member 40 can be formed of a member capable of reflecting light from the light emitting element 10. In this way, the light emitted from the light emitting element 10 is directly or reflected by the covering member 40 and incident on the translucent member 20, passes through the translucent member 20, and is formed on the light emitting surface of the light emitting device 1. It is emitted to the outside from the upper surface 22 of a certain translucent member 20.

ここで、被覆部材４０の上面は、透光性部材２０の上面２２の高さと同等か、透光性部材２０の上面２２よりも低いことが好ましい。発光装置１の発光面となる透光性部材２０の上面２２から出射された光は、横方向にも広がりを持つ。そのため、被覆部材４０の上面が、透光性部材２０の上面２２の高さよりも高い場合には、透光性部材２０の上面２２から出射された光が被覆部材４０の上面に当たって反射され、配光のばらつきが生じる。よって、被覆部材４０は、上面の高さを透光性部材２０の上面２２と同等あるいは低くするように設けることで、発光素子１０から出射された光を外部に効率よく取り出すことができるので好ましい。 Here, it is preferable that the upper surface of the covering member 40 is equal to the height of the upper surface 22 of the translucent member 20 or lower than the upper surface 22 of the translucent member 20. The light emitted from the upper surface 22 of the translucent member 20 which is the light emitting surface of the light emitting device 1 has a spread in the lateral direction. Therefore, when the upper surface of the covering member 40 is higher than the height of the upper surface 22 of the translucent member 20, the light emitted from the upper surface 22 of the translucent member 20 hits the upper surface of the covering member 40 and is reflected and arranged. Light variation occurs. Therefore, it is preferable that the covering member 40 is provided so that the height of the upper surface is equal to or lower than that of the upper surface 22 of the translucent member 20 so that the light emitted from the light emitting element 10 can be efficiently taken out to the outside. ..

被覆部材４０は、シリコーン樹脂、変性シリコーン樹脂、エポキシ樹脂、変性エポキシ樹脂、アクリル樹脂、または、これらの樹脂を少なくとも一種以上含むハイブリッド樹脂からなる母材に光反射性物質を含有させることで形成することができる。光反射性物質としては、酸化チタン、酸化ケイ素、酸化ジルコニウム、酸化イットリウム、イットリア安定化ジルコニア、チタン酸カリウム、アルミナ、窒化アルミニウム、窒化ホウ素、ムライト等を用いることができる。被覆部材４０は、光反射性物質の含有濃度、密度により光の反射量、透過量が異なるため、発光装置１の形状、大きさに応じて、適宜濃度、密度を調整するとよい。また、被覆部材４０は、光反射性に加え、放熱性を併せ持つ材料とすると、光反射性を持たせつつ放熱性を向上させることができる。このような材料として、熱伝導率の高い窒化アルミニウムや窒化ホウ素が挙げられる。 The covering member 40 is formed by containing a light-reflecting substance in a base material made of a silicone resin, a modified silicone resin, an epoxy resin, a modified epoxy resin, an acrylic resin, or a hybrid resin containing at least one of these resins. be able to. As the light-reflecting substance, titanium oxide, silicon oxide, zirconium oxide, yttrium oxide, yttria-stabilized zirconia, potassium titanate, alumina, aluminum nitride, boron nitride, mullite and the like can be used. Since the light reflecting amount and the transmitted amount of the covering member 40 differ depending on the content concentration and density of the light reflecting substance, the concentration and density may be appropriately adjusted according to the shape and size of the light emitting device 1. Further, if the covering member 40 is made of a material having not only light reflectivity but also heat dissipation, the heat dissipation can be improved while having light reflectivity. Examples of such a material include aluminum nitride and boron nitride having high thermal conductivity.

［基板］
基板５０は、発光素子１０を実装し、発光装置１を電気的に外部と接続する。基板５０は、平板状の支持部材及び支持部材の表面及び／または内部に配置された導体配線を備えて構成されている。なお、基板５０は、発光素子１０の電極の構成、大きさに応じて導体配線の形状、大きさ等の構造が設定される。また、基板５０の支持部材は、絶縁性材料を用いることが好ましく、かつ、発光素子１０から出射される光や外光等を透過しにくい材料を用いることが好ましい。基板５０は、ある程度の強度を有する材料を用いることが好ましい。具体的には、アルミナ、窒化アルミニウム、ムライト等のセラミックス、フェノール樹脂、エポキシ樹脂、ポリイミド樹脂、ビスマレイミドトリアジン樹脂（ＢＴレジン）、ポリフタルアミド（ＰＰＡ）等の樹脂が挙げられる。なお、支持部材は、キャビティを有する構造としてもよい。これにより、前記の被覆部材４０を滴下する等により容易に形成することができる。導体配線及び放熱用端子は、例えば、Ｃｕ，Ａｇ，Ａｕ，Ａｌ，Ｐｔ，Ｔｉ，Ｗ，Ｐｄ，Ｆｅ，Ｎｉ等の金属またはこれらを含む合金等を用いて形成することができる。このような導体配線は、電解めっき、無電解めっき、蒸着、スパッタ等によって形成することができる。 [substrate]
The substrate 50 mounts a light emitting element 10 and electrically connects the light emitting device 1 to the outside. The substrate 50 is configured to include a flat plate-shaped support member and conductor wiring arranged on the surface and / or inside of the support member. The substrate 50 is set with a structure such as the shape and size of the conductor wiring according to the configuration and size of the electrodes of the light emitting element 10. Further, it is preferable to use an insulating material for the support member of the substrate 50, and it is preferable to use a material that does not easily transmit light emitted from the light emitting element 10, external light, or the like. It is preferable to use a material having a certain level of strength for the substrate 50. Specific examples thereof include ceramics such as alumina, aluminum nitride and mullite, and resins such as phenol resin, epoxy resin, polyimide resin, bismaleimide triazine resin (BT resin) and polyphthalamide (PPA). The support member may have a structure having a cavity. Thereby, it can be easily formed by dropping the covering member 40 or the like. The conductor wiring and the heat dissipation terminal can be formed by using, for example, a metal such as Cu, Ag, Au, Al, Pt, Ti, W, Pd, Fe, Ni, or an alloy containing these. Such conductor wiring can be formed by electrolytic plating, electroless plating, thin film deposition, spatter, or the like.

［接着材］
接着材６０は、発光素子１０と透光性部材２０とを接合するものである。接着材６０は、発光素子１０の上面１１から側面１２の少なくとも一部に連続すると共に、被覆部材４０と発光素子１０の側面１２との間に介在して設けられる。被覆部材４０と発光素子１０の側面１２との間に介在する接着材６０の上面は、透光性部材２０の下面２１と接して設けられている。接着材６０は、発光素子１０からの出射光を透光性部材２０に導光することができる透光性材料を用いることが好ましい。接着材６０は、エポキシ樹脂またはシリコーン樹脂のような周知の接着材、高屈折率の有機接着材、無機系接着材、低融点ガラスによる接着材等を用いることができる。接着材６０は、発光素子１０の上面１１から側面１２にまで延在し、フィレット６５として設けられることが好ましい。フィレット６５は、透光性部材２０の下面２１と発光素子１０の側面１２との双方に接し、被覆部材４０側に凹の曲面であることが好ましい。このような形状によって、発光素子１０から出射される光は接着材６０のフィレット面により反射され、透光性部材２０へと導光されやすくなる。なお、透光性部材２０と発光素子１０とは、接着材６０を用いずに、圧着、焼結、表面活性化接合、原子拡散接合、水酸基接合等により直接接合されてもよい。 [Adhesive]
The adhesive material 60 joins the light emitting element 10 and the translucent member 20. The adhesive 60 is continuous from the upper surface 11 of the light emitting element 10 to at least a part of the side surface 12, and is provided between the covering member 40 and the side surface 12 of the light emitting element 10. The upper surface of the adhesive 60 interposed between the covering member 40 and the side surface 12 of the light emitting element 10 is provided in contact with the lower surface 21 of the translucent member 20. As the adhesive material 60, it is preferable to use a translucent material capable of guiding the light emitted from the light emitting element 10 to the translucent member 20. As the adhesive material 60, a well-known adhesive material such as an epoxy resin or a silicone resin, an organic adhesive material having a high refractive index, an inorganic adhesive material, an adhesive material made of low melting point glass, or the like can be used. The adhesive 60 extends from the upper surface 11 to the side surface 12 of the light emitting element 10 and is preferably provided as a fillet 65. The fillet 65 is preferably in contact with both the lower surface 21 of the translucent member 20 and the side surface 12 of the light emitting element 10, and is preferably a concave curved surface on the covering member 40 side. With such a shape, the light emitted from the light emitting element 10 is reflected by the fillet surface of the adhesive 60, and is easily guided to the translucent member 20. The translucent member 20 and the light emitting element 10 may be directly bonded by pressure bonding, sintering, surface activation bonding, atomic diffusion bonding, hydroxyl group bonding, or the like without using the adhesive 60.

発光装置１は、以上説明した構成を備えているので、一例として、オートバイ、自動車等のヘッドライト、あるいは船舶等の照明として使用される場合に、発光素子１０から出射される光をより遠くへ照射することができる。すなわち、発光装置１では、発光素子１０から光が出射されると、被覆部材４０に反射されずに、透光性部材２０中を伝搬して透光性部材２０の上面２２に直接向かう光と、被覆部材４０に反射して透光性部材２０の上面２２から出る光とがある。そして、発光装置１では、透光性部材２０が凹部９を有することで、透光性部材２０の下面２１から入射した光が上面２２側に導光され易くすることができる。さらに、透光性部材２０は、凸状に形成されているため、発光素子１０からの出射光は透光性部材２０の上面２２に集約される。これにより、ヘッドライトのハイビーム用途等に適した、高輝度で、より遠方に光を照射することができる発光装置１とすることができる。 Since the light emitting device 1 has the configuration described above, as an example, when it is used as a headlight of a motorcycle, an automobile or the like, or as a lighting of a ship or the like, the light emitted from the light emitting element 10 is farther away. Can be irradiated. That is, in the light emitting device 1, when light is emitted from the light emitting element 10, the light propagates through the translucent member 20 and directly heads toward the upper surface 22 of the translucent member 20 without being reflected by the covering member 40. , There is light reflected from the covering member 40 and emitted from the upper surface 22 of the translucent member 20. Then, in the light emitting device 1, since the translucent member 20 has the recess 9, the light incident from the lower surface 21 of the translucent member 20 can be easily guided to the upper surface 22 side. Further, since the translucent member 20 is formed in a convex shape, the light emitted from the light emitting element 10 is collected on the upper surface 22 of the translucent member 20. This makes it possible to obtain a light emitting device 1 capable of irradiating light with high brightness and farther away, which is suitable for high beam applications of headlights and the like.

さらに、発光装置１は、透光性部材２０の周辺部２５の表面に縞状の凹凸が上面２２から下面２１に向かって形成されていることにより、被覆部材４０と透光性部材２０の周辺部２５との接触面積が大きくなり、密着性が向上する。 Further, in the light emitting device 1, striped irregularities are formed on the surface of the peripheral portion 25 of the translucent member 20 from the upper surface 22 toward the lower surface 21, so that the peripheral portions of the covering member 40 and the translucent member 20 are formed. The contact area with the portion 25 is increased, and the adhesion is improved.

［発光装置の製造方法］
次に発光装置の製造方法の一例について説明する。図９Ａは、第１実施形態に係る発光装置の製造方法において基板に発光素子を実装した状態を模式的に示す説明図である。図９Ｂは、第１実施形態に係る発光装置の製造方法において発光素子上に接着材を塗布した状態を模式的に示す説明図である。図９Ｃは、第１実施形態に係る発光装置の製造方法において発光素子上に接着材を介して透光性部材を接合した状態を模式的に示す説明図である。図９Ｄは、第１実施形態に係る発光装置の製造方法において透光性部材の上面を除く表面および発光素子の周縁に光反射性部材を設けた状態を模式的に示す説明図である。図１０は、第１実施形態に係る発光装置の製造方法において用いる透光性基板の一例を模式的に示す説明図である。図１１は、第１実施形態に係る発光装置の製造方法においてレーザ加工工程を模式的に示す説明図である。図１２は、図１１のＸＩＩ－ＸＩＩ線における透光性基板の断面を模式的に示す断面図である。 [Manufacturing method of light emitting device]
Next, an example of a method for manufacturing a light emitting device will be described. FIG. 9A is an explanatory diagram schematically showing a state in which a light emitting element is mounted on a substrate in the method for manufacturing a light emitting device according to the first embodiment. FIG. 9B is an explanatory diagram schematically showing a state in which an adhesive is applied on a light emitting element in the method for manufacturing a light emitting device according to the first embodiment. FIG. 9C is an explanatory diagram schematically showing a state in which a translucent member is bonded onto a light emitting element via an adhesive in the method for manufacturing a light emitting device according to the first embodiment. FIG. 9D is an explanatory diagram schematically showing a state in which a light reflecting member is provided on the surface excluding the upper surface of the translucent member and the peripheral edge of the light emitting element in the method for manufacturing a light emitting device according to the first embodiment. FIG. 10 is an explanatory diagram schematically showing an example of a translucent substrate used in the method for manufacturing a light emitting device according to the first embodiment. FIG. 11 is an explanatory diagram schematically showing a laser processing process in the method for manufacturing a light emitting device according to the first embodiment. FIG. 12 is a cross-sectional view schematically showing a cross section of the translucent substrate in the XII-XII line of FIG.

発光装置の製造方法は、透光性部材２０を準備する工程と、発光素子１０の上面１１に透光性部材２０の下面２１を接合する工程と、透光性部材２０の上面２２を露出させて透光性部材２０の凹部９、発光素子１０の側面１２を被覆するように被覆部材４０を形成する工程と、を含む。透光性部材２０を準備する工程では、矩形の上面２２を形成する本体部２４と、本体部２４の周辺において本体部２４より厚みが薄い周辺部２５と、を有し、周辺部２５の側面が、矩形の角部５に対応する位置に形成される凹部９を有する透光性部材２０を準備する。この透光性部材２０を準備する工程の詳細については後記する。 The method for manufacturing the light emitting device includes a step of preparing the translucent member 20, a step of joining the lower surface 21 of the translucent member 20 to the upper surface 11 of the light emitting element 10, and exposing the upper surface 22 of the translucent member 20. A step of forming the covering member 40 so as to cover the recess 9 of the translucent member 20 and the side surface 12 of the light emitting element 10 is included. In the step of preparing the translucent member 20, the main body portion 24 forming the rectangular upper surface 22 and the peripheral portion 25 having a thickness thinner than the main body portion 24 around the main body portion 24 are provided, and the side surface of the peripheral portion 25 is provided. Prepares a translucent member 20 having a recess 9 formed at a position corresponding to a rectangular corner portion 5. Details of the process of preparing the translucent member 20 will be described later.

（発光素子の上面に透光性部材の下面を接合する工程）
発光素子１０に透光性部材２０を接合する工程では、例えば、図９Ａに示すように、基板５０上に載置された発光素子１０を準備し、図９Ｂに示すように、発光素子１０の上面に接着材６１を滴下する。滴下された接着材６１は、透光性部材２０により押圧され、発光素子１０の側面まで亘って濡れ広がり、フィレット６５が形成された接着材６０となる。滴下する接着材６１の量及び粘度は、発光素子１０の側面にフィレットが形成され、かつ接着材６１が基板５０まで濡れ広がらない程度に適宜調整される。そして、図９Ｃに示すように、透光性部材２０は、発光素子１０の上面に配置された接着材６０を介して透光性部材２０の下面が発光素子１０上に接合される。 (Step of joining the lower surface of the translucent member to the upper surface of the light emitting element)
In the step of joining the translucent member 20 to the light emitting element 10, for example, as shown in FIG. 9A, the light emitting element 10 mounted on the substrate 50 is prepared, and as shown in FIG. 9B, the light emitting element 10 is provided. The adhesive material 61 is dropped on the upper surface. The dropped adhesive 61 is pressed by the translucent member 20 and spreads wet over the side surface of the light emitting element 10 to become the adhesive 60 on which the fillet 65 is formed. The amount and viscosity of the adhesive material 61 to be dropped are appropriately adjusted so that fillets are formed on the side surfaces of the light emitting element 10 and the adhesive material 61 does not wet and spread to the substrate 50. Then, as shown in FIG. 9C, in the translucent member 20, the lower surface of the translucent member 20 is joined onto the light emitting element 10 via the adhesive 60 arranged on the upper surface of the light emitting element 10.

（被覆部材を形成する工程）
続いて、被覆部材４０を形成する工程を行う。この工程では、透光性部材２０の凹部９と発光素子１０の側面とを覆う被覆部材４０が設けられる。被覆部材４０の形成は、例えば、ポッティングにより行うことができる。被覆部材４０は、発光素子１０と基板５０との間、発光素子１０と側面のフィレット６５、および、透光性部材２０の凹部９を覆う。この際、透光性部材２０の上面２２が被覆部材４０から露出するよう、被覆部材は透光性部材２０から離間した基板５０上面に滴下することが好ましい。 (Step of forming a covering member)
Subsequently, a step of forming the covering member 40 is performed. In this step, a covering member 40 that covers the recess 9 of the translucent member 20 and the side surface of the light emitting element 10 is provided. The covering member 40 can be formed, for example, by potting. The covering member 40 covers between the light emitting element 10 and the substrate 50, the fillet 65 on the side surface of the light emitting element 10, and the recess 9 of the translucent member 20. At this time, it is preferable that the covering member is dropped on the upper surface of the substrate 50 separated from the translucent member 20 so that the upper surface 22 of the translucent member 20 is exposed from the covering member 40.

ここで、透光性部材２０の垂直側面３１は、透光性部材２０の下面２１及び上面２２に対して略垂直に形成されているので、基板５０上面に滴下された未硬化の被覆部材４０が、透光性部材２０の上面２２へ這い上がることを抑制することができる。また、透光性部材２０が凹部９を有することにより、ポッティングにより基板５０上面に滴下された被覆部材４０を形成する未硬化の樹脂材料が、凹部９を起点として周辺部２５の傾斜側面３２へと流動しやすくなる。これにより、被覆部材４０におけるボイドの発生を抑制することができる。
なお、被覆部材４０は、圧縮成形、トランスファー成形、射出成形等の金型成形、印刷等によって形成することとしてもよい。 Here, since the vertical side surface 31 of the translucent member 20 is formed substantially perpendicular to the lower surface 21 and the upper surface 22 of the translucent member 20, the uncured covering member 40 dropped on the upper surface of the substrate 50. However, it is possible to prevent the translucent member 20 from crawling up to the upper surface 22. Further, since the translucent member 20 has the recess 9, the uncured resin material forming the covering member 40 dropped on the upper surface of the substrate 50 by potting is transferred from the recess 9 to the inclined side surface 32 of the peripheral portion 25. It becomes easy to flow. As a result, the generation of voids in the covering member 40 can be suppressed.
The covering member 40 may be formed by compression molding, transfer molding, mold molding such as injection molding, printing, or the like.

（透光性部材を準備する工程）
次に、透光性部材２０を準備する工程について、１枚の透光性基板をレーザ加工して複数の透光性部材２０を形成するものとして説明する。 (Process to prepare translucent member)
Next, the step of preparing the translucent member 20 will be described as assuming that one translucent substrate is laser-processed to form a plurality of translucent members 20.

透光性部材２０を準備する工程は、図１０および図１１に示すように、透光性基板８０の表面にレーザ加工により分割溝８１を格子状に形成すると共に、分割溝８１の格子点８５を貫通させるレーザ加工工程と、図１２に示すように、分割溝８１の中心線８２に沿って透光性基板８０を複数の透光性部材２０に分割する工程と、を含む。
板状の透光性基板８０の表面に、レーザ加工により格子状の分割溝８１を形成することにより、レーザ加工が重複して施される格子点８５において、透光性基板８０を貫通させる貫通孔を形成することができる。レーザ加工による貫通孔は平面視略円形となる。その後、分割溝８１の中心線８２に沿って透光性基板８０を複数の透光性部材２０に分割することで、矩形の上面を形成する本体部２４と、本体部２４の周辺において本体部２４より厚みが薄い周辺部２５と、を有し、周辺部２５の側面が、矩形の角部に対応する位置に形成される凹部９を有する透光性部材２０が形成される。このようにして形成された凹部９は、平面視において湾曲した形状の湾曲側面２６を有する。 In the step of preparing the translucent member 20, as shown in FIGS. 10 and 11, the split grooves 81 are formed in a grid pattern on the surface of the translucent substrate 80 by laser processing, and the grid points 85 of the split grooves 81 are formed. The process includes a laser processing step of penetrating the light-transmitting substrate 80 and a step of dividing the translucent substrate 80 into a plurality of translucent members 20 along the center line 82 of the dividing groove 81, as shown in FIG.
By forming a grid-shaped dividing groove 81 on the surface of the plate-shaped translucent substrate 80 by laser processing, the light-transmitting substrate 80 is penetrated through the lattice points 85 where the laser processing is overlapped. Holes can be formed. The through hole formed by laser processing has a substantially circular shape in a plan view. After that, by dividing the translucent substrate 80 into a plurality of translucent members 20 along the center line 82 of the dividing groove 81, the main body portion 24 forming the upper surface of the rectangle and the main body portion around the main body portion 24 are formed. A translucent member 20 having a peripheral portion 25 thinner than 24 and a recess 9 formed in a position where the side surface of the peripheral portion 25 corresponds to a rectangular corner portion is formed. The recess 9 thus formed has a curved side surface 26 having a curved shape in a plan view.

レーザ加工工程は、パルスレーザ光のレーザスポットを分割溝８１の延伸方向および溝幅方向に移動させながら、パルスレーザ光により透光性基板８０の分割溝８１の表面に、分割溝８１の深さ方向に沿ったレーザ痕８４を形成する。このレーザ痕８４により、透光性部材２０は、周辺部２５の表面に縞状の凹凸が上面から下面に向かって形成される。
レーザ加工条件は、透光性基板８０に適切に分割溝８１を形成できるものであればよく、例えば、以下に示すものを挙げることができる。レーザ種類は、ＹＡＧレーザであることが好ましい。例えば、レーザ光の発振波長は、３５５ｎｍ（ＵＶ：第３高調波)である。レーザ光はパルス光であり、レーザ光のパルス幅は、加工品質を向上させる観点からは、１フェムト秒以上１ナノ秒以下（１０-15秒以上１０-9秒以下）であることが好ましい。レーザ光のパルスエネルギーは、例えば、レーザ光の波長が３５５ｎｍである場合、加工速度を高速化する観点からは、１０～８０μＪであることが好ましい。また、レーザ光の幅であるビーム径は、５０μｍ程度であることが好ましい。 In the laser processing step, while moving the laser spot of the pulsed laser beam in the extending direction and the groove width direction of the dividing groove 81, the depth of the dividing groove 81 is formed on the surface of the dividing groove 81 of the translucent substrate 80 by the pulsed laser light. A laser mark 84 along the direction is formed. Due to the laser marks 84, the translucent member 20 is formed with striped irregularities on the surface of the peripheral portion 25 from the upper surface to the lower surface.
The laser processing conditions may be any as long as the split groove 81 can be appropriately formed on the translucent substrate 80, and examples thereof include those shown below. The laser type is preferably a YAG laser. For example, the oscillation wavelength of the laser beam is 355 nm (UV: third harmonic). The laser beam is pulsed light, and the pulse width of the laser beam is preferably 1 femtosecond or more and 1 nanosecond or less (10 -15 seconds or more and 10 -9 seconds or less) from the viewpoint of improving the processing quality. For example, when the wavelength of the laser light is 355 nm, the pulse energy of the laser light is preferably 10 to 80 μJ from the viewpoint of increasing the processing speed. The beam diameter, which is the width of the laser beam, is preferably about 50 μm.

透光性基板８０を上記レーザ加工条件で加工した場合、作製された透光性部材２０の傾斜側面３２の表面粗さは、以下に示す範囲であった。
透光性部材２０の傾斜側面３２は、日本産業規格ＪＩＳ規格Ｂ０６０１：２０１３で規定される算術平均粗さＲａが、１μｍ以上５μｍ以下である。この算術平均粗さＲａは、透光性部材２０の傾斜側面３２である加工面の線粗さを表し、ｎ＝１６ヶ所として、それら任意の２点間において凹凸を２次元的に表した測定値の平均値である。
透光性部材２０の傾斜側面３２は、国際規格ＩＳＯ２５１７８で規定される面粗さＳａが、１μｍ以上５μｍ以下である。この面粗さＳａは、透光性部材２０の傾斜側面３２である加工面の面粗さを表し、ｎ＝６ヶ所として、任意のエリアにおいて凹凸を３次元的に表した測定値の平均値である。 When the translucent substrate 80 was machined under the above laser processing conditions, the surface roughness of the inclined side surface 32 of the manufactured translucent member 20 was in the range shown below.
The inclined side surface 32 of the translucent member 20 has an arithmetic average roughness Ra defined by Japanese Industrial Standards JIS standard B0601: 2013 of 1 μm or more and 5 μm or less. This arithmetic mean roughness Ra represents the line roughness of the machined surface which is the inclined side surface 32 of the translucent member 20, and is a measurement in which the unevenness is two-dimensionally represented between any two points with n = 16 points. The average value of the values.
The inclined side surface 32 of the translucent member 20 has a surface roughness Sa defined by the international standard ISO25178 of 1 μm or more and 5 μm or less. This surface roughness Sa represents the surface roughness of the machined surface which is the inclined side surface 32 of the translucent member 20, and is the average value of the measured values in which the unevenness is three-dimensionally expressed in an arbitrary area with n = 6 points. Is.

前記のような各工程により製造された発光装置１は、凹部９が形成された透光性部材２０を発光素子１０に接合するので、従来は反射を繰り返し減衰して外部に取り出せなかった光を有効に利用して輝度を向上させることができる。また、透光性部材２０の傾斜側面３２に縞状の凹凸８４が形成されているので、被覆部材４０と透光性部材２０の鍔部３０とを強固に密着させることができる。 In the light emitting device 1 manufactured by each step as described above, since the translucent member 20 in which the recess 9 is formed is bonded to the light emitting element 10, light that could not be taken out to the outside by repeatedly attenuating the reflection is conventionally attenuated. It can be effectively used to improve the brightness. Further, since the striped unevenness 84 is formed on the inclined side surface 32 of the translucent member 20, the covering member 40 and the flange portion 30 of the translucent member 20 can be firmly adhered to each other.

さらに、透光性部材２０の上面２２の形状を、発光素子１０の上面１１の形状と相似の形状とすることで、発光素子１０の上に透光性部材２０を接合する際に位置合わせし易くすることができる。特に、平面視において透光性部材２０が、矩形の角部５に対応する位置にそれぞれ凹部９を有しているので、位置合わせの精度を向上させることができる。 Further, by making the shape of the upper surface 22 of the translucent member 20 similar to the shape of the upper surface 11 of the light emitting element 10, it is aligned when the translucent member 20 is joined onto the light emitting element 10. It can be made easier. In particular, since the translucent member 20 has recesses 9 at positions corresponding to the corners 5 of the rectangle in a plan view, the accuracy of alignment can be improved.

以上、本発明に係る発光装置および発光装置の製造方法について、発明を実施するための形態によって具体的に説明したが、本発明の趣旨はこれらの記載に限定されるものではなく、特許請求の範囲の記載に基づいて広く解釈されなければならない。また、これらの記載に基づいて種々変更、改変などしたものも本発明の趣旨に含まれることはいうまでもない。 Although the light emitting device and the method for manufacturing the light emitting device according to the present invention have been specifically described above in terms of the mode for carrying out the invention, the gist of the present invention is not limited to these descriptions, and claims are made. It must be broadly interpreted based on the description of the scope. Needless to say, various changes and modifications based on these descriptions are also included in the gist of the present invention.

例えば、発光装置は、図７の断面形状の透光性部材２０を備えるものとしたが、図１３の断面形状の透光性部材２０Ｂを備えるものであってもよい。透光性部材２０Ｂは、断面視形状が凸形状であり、発光素子１０の上面１１と接合する下面２１Ｂと、下面２１Ｂより狭い上面２２Ｂと、を備えている。透光性部材２０Ｂは、矩形の上面２２Ｂを形成する本体部２４Ｂと、本体部２４Ｂの周辺において本体部２４Ｂより厚みが薄い周辺部２５Ｂと、を有している。なお、周辺部２５Ｂは、上面２２Ｂを形成する矩形の角部に対応する位置であって周辺部２５Ｂの側面に本体部２４Ｂ側に凹んだ凹部を有している。透光性部材２０Ｂの周辺部２５Ｂは、凹部を介して複数の鍔部３０Ｂを有する。 For example, although the light emitting device is provided with the translucent member 20 having the cross-sectional shape of FIG. 7, it may be provided with the translucent member 20B having the cross-sectional shape of FIG. The translucent member 20B has a convex cross-sectional shape, and includes a lower surface 21B joined to the upper surface 11 of the light emitting element 10 and an upper surface 22B narrower than the lower surface 21B. The translucent member 20B has a main body portion 24B forming a rectangular upper surface 22B, and a peripheral portion 25B that is thinner than the main body portion 24B around the main body portion 24B. The peripheral portion 25B has a concave portion on the side surface of the peripheral portion 25B, which is a position corresponding to a rectangular corner portion forming the upper surface 22B and is recessed toward the main body portion 24B. The peripheral portion 25B of the translucent member 20B has a plurality of flange portions 30B via recesses.

鍔部３０Ｂは、本体部２４Ｂ側から外縁まで略同じ厚みになるように形成されている。鍔部３０Ｂは、上面２２Ｂの矩形の一辺に対向する位置での上面３２Ｂと、第１垂直側面３１Ｂと、第２垂直側面３３と、周辺部２５Ｂの位置での下面２１Ｂと、周辺部２５Ｂの矩形の角部に対応する側面と、により形成されている。第１垂直側面３１Ｂは、透光性部材２０Ｂの下面２１Ｂに連続し、下面２１Ｂ及び上面２２Ｂに対して略垂直に形成されている。上面３２Ｂは、第１垂直側面３１Ｂに連続し、第１垂直側面３１Ｂに対して略垂直に形成されている。第２垂直側面３３は、上面３２Ｂに連続すると共に、上面３２Ｂに対して略垂直に形成されている。また、第２垂直側面３３は、透光性部材２０Ｂの上面２２Ｂに連続すると共に、上面２２Ｂに対して略垂直に形成されている。鍔部３０Ｂは、分割溝８１の幅方向の深さが略同一になるようにレーザ加工することで形成することができる。この変形例においても、輝度を向上させる効果を奏することができる。 The flange portion 30B is formed so as to have substantially the same thickness from the main body portion 24B side to the outer edge. The flange portion 30B includes an upper surface 32B at a position facing one side of the rectangle of the upper surface 22B, a first vertical side surface 31B, a second vertical side surface 33, a lower surface 21B at a position of a peripheral portion 25B, and a peripheral portion 25B. It is formed by a side surface corresponding to a corner of a rectangle. The first vertical side surface 31B is continuous with the lower surface 21B of the translucent member 20B and is formed substantially perpendicular to the lower surface 21B and the upper surface 22B. The upper surface 32B is continuous with the first vertical side surface 31B and is formed substantially perpendicular to the first vertical side surface 31B. The second vertical side surface 33 is continuous with the upper surface 32B and is formed substantially perpendicular to the upper surface 32B. Further, the second vertical side surface 33 is continuous with the upper surface 22B of the translucent member 20B and is formed substantially perpendicular to the upper surface 22B. The flange portion 30B can be formed by laser machining so that the depths of the dividing grooves 81 in the width direction are substantially the same. Also in this modification, the effect of improving the brightness can be achieved.

また、発光装置１は、透光性部材２０の下面２１が１つの発光素子１０と接合されているものとしたが、透光性部材２０の下面２１が複数の発光素子１０と接合されているものであってもよい。この変形例に係る発光装置では、例えば２つの発光素子１０が、全体として平面視で矩形状になるように整列して配置されている。この場合、透光性部材を準備する工程は、透光性部材の上面の形状が、２つの発光素子１０の上面を覆う矩形状である透光性部材を準備する。この変形例においても、輝度を向上させる効果を奏することができる。 Further, in the light emitting device 1, the lower surface 21 of the translucent member 20 is bonded to one light emitting element 10, but the lower surface 21 of the translucent member 20 is bonded to a plurality of light emitting elements 10. It may be a thing. In the light emitting device according to this modification, for example, two light emitting elements 10 are arranged and arranged so as to be rectangular in a plan view as a whole. In this case, in the step of preparing the translucent member, the translucent member is prepared in which the shape of the upper surface of the translucent member is a rectangular shape covering the upper surfaces of the two light emitting elements 10. Also in this modification, the effect of improving the brightness can be achieved.

１ 発光装置
３ 辺
５ 角部
７ 外縁
９ 凹部
１０ 発光素子
１１ 発光素子の上面
１２ 発光素子の側面
２０，２０Ｂ 透光性部材
２１，２１Ｂ 透光性部材の下面
２２，２２Ｂ 透光性部材の上面
２４，２４Ｂ 本体部
２５，２５Ｂ 周辺部
２６ 湾曲側面
３０，３０Ｂ 鍔部
３１ 垂直側面
３１Ｂ 第１垂直側面
３２，３２Ｂ 傾斜側面
３３ 第２垂直側面
４０ 被覆部材
５０ 基板
６０，６１ 接着材
６５ フィレット
７０ 保護素子
８０ 透光性基板
８１ 分割溝
８２ 中心線
８３ 分割溝の表面
８４ 縞状の凹凸（レーザ痕）
８５ 格子点 1 Light emitting device 3 sides 5 corners 7 outer edge 9 concave part 10 light emitting element 11 upper surface of light emitting element 12 side surface of light emitting element 20,20B translucent member 21,21B lower surface of translucent member 22,22B upper surface of translucent member 24, 24B Main body 25, 25B Peripheral part 26 Curved side surface 30, 30B Flange part 31 Vertical side surface 31B First vertical side surface 32, 32B Inclined side surface 33 Second vertical side surface 40 Covering member 50 Substrate 60, 61 Adhesive material 65 Fillet 70 Protection Element 80 Translucent substrate 81 Divided groove 82 Center line 83 Divided groove surface 84 Striped unevenness (laser marks)
85 grid points

Claims (12)

発光素子と、
矩形の上面と前記発光素子に接合される下面とを有する透光性部材と、
前記透光性部材の前記上面を露出させて前記透光性部材および前記発光素子の側面を被覆する被覆部材と、を備え、
前記透光性部材は、
前記矩形の上面を形成する本体部と、
前記本体部の周辺において前記本体部より厚みが薄い周辺部と、を有し、
前記周辺部は、前記矩形の角部に対応する位置であって前記周辺部の側面に前記本体部側に凹んだ凹部を有し、
前記透光性部材は、前記周辺部の表面に縞状の凹凸が前記上面から前記下面に向かって形成されている発光装置。 Light emitting element and
A translucent member having a rectangular upper surface and a lower surface joined to the light emitting element,
A covering member for exposing the upper surface of the translucent member to cover the translucent member and the side surface of the light emitting element is provided.
The translucent member is
The main body that forms the upper surface of the rectangle and
It has a peripheral portion that is thinner than the main body portion in the periphery of the main body portion.
The peripheral portion has a recessed portion on the side surface of the peripheral portion at a position corresponding to the corner portion of the rectangle and is recessed toward the main body portion.
The translucent member is a light emitting device in which striped irregularities are formed on the surface of the peripheral portion from the upper surface toward the lower surface . 発光素子と、
矩形の上面と前記発光素子に接合される下面とを有する透光性部材と、
前記透光性部材の前記上面を露出させて前記透光性部材および前記発光素子の側面を被覆する被覆部材と、を備え、
前記透光性部材は、
前記矩形の上面を形成する本体部と、
前記本体部の周辺において前記本体部より厚みが薄い周辺部と、を有し、
前記周辺部は、前記矩形の角部に対応する位置であって前記周辺部の側面に前記本体部側に凹んだ凹部を有し、
前記透光性部材の前記凹部は、平面視において湾曲した形状となる湾曲側面を有する発光装置。 Light emitting element and
A translucent member having a rectangular upper surface and a lower surface joined to the light emitting element,
A covering member for exposing the upper surface of the translucent member to cover the translucent member and the side surface of the light emitting element is provided.
The translucent member is
The main body that forms the upper surface of the rectangle and
It has a peripheral portion that is thinner than the main body portion in the periphery of the main body portion.
The peripheral portion has a recessed portion on the side surface of the peripheral portion at a position corresponding to the corner portion of the rectangle and is recessed toward the main body portion.
The recess of the translucent member is a light emitting device having a curved side surface having a curved shape in a plan view. 前記透光性部材の前記周辺部は、前記凹部を介して前記矩形の各辺に沿ってそれぞれ形成される鍔部を有する請求項１または請求項２に記載の発光装置。 The light emitting device according to claim 1 or 2, wherein the peripheral portion of the translucent member has a flange portion formed along each side of the rectangle via the recess. 前記透光性部材は、蛍光体を含有する、請求項１から請求項３のいずれか一項に記載の発光装置。 The light emitting device according to any one of claims 1 to 3, wherein the translucent member contains a fluorescent substance. 前記透光性部材の前記鍔部は、平面視において略矩形状である、請求項３に記載の発光装置。 The light emitting device according to claim 3, wherein the flange portion of the translucent member has a substantially rectangular shape in a plan view. 前記透光性部材の前記周辺は、前記本体部側から外縁まで徐々に薄くなるように形成されている、請求項１から請求項５のいずれか一項に記載の発光装置。 The light emitting device according to any one of claims 1 to 5, wherein the periphery of the translucent member is formed so as to gradually become thinner from the main body side to the outer edge. 前記透光性部材の下面は複数の発光素子と接合されている、請求項１から請求項６のいずれか一項に記載の発光装置。 The light emitting device according to any one of claims 1 to 6 , wherein the lower surface of the translucent member is joined to a plurality of light emitting elements. 矩形の上面を形成する本体部と、前記本体部の周辺において前記本体部より厚みが薄い周辺部と、を有し、前記周辺部の側面が、前記矩形の角部に対応する位置に形成される凹部を有する透光性部材を準備する工程と、
発光素子の上面に前記透光性部材の下面を接合する工程と、
前記透光性部材の前記上面を露出させて前記透光性部材の前記凹部、前記発光素子の側面を被覆するように被覆部材を形成する工程と、を含み、
前記透光性部材を準備する工程は、
透光性基板の表面にレーザ加工により分割溝を格子状に形成すると共に、前記分割溝の格子点を貫通させるレーザ加工工程と、
前記分割溝の中心線に沿って前記透光性基板を複数の透光性部材に分割する工程と、を含み、
前記レーザ加工工程は、パルスレーザ光のレーザスポットを前記分割溝の延伸方向および溝幅方向に移動させながら、前記パルスレーザ光により前記透光性基板の分割溝の表面に、分割溝の深さ方向に沿ったレーザ痕を形成する発光装置の製造方法。 It has a main body portion that forms an upper surface of a rectangle and a peripheral portion that is thinner than the main body portion around the main body portion, and the side surface of the peripheral portion is formed at a position corresponding to a corner portion of the rectangle. The process of preparing a translucent member with a concave portion and
The step of joining the lower surface of the translucent member to the upper surface of the light emitting element,
A step of forming a covering member so as to expose the upper surface of the translucent member to cover the recess of the translucent member and the side surface of the light emitting element .
The step of preparing the translucent member is
A laser processing process in which division grooves are formed in a grid pattern on the surface of a translucent substrate by laser processing and the lattice points of the division grooves are penetrated.
Including a step of dividing the translucent substrate into a plurality of translucent members along the center line of the dividing groove.
In the laser processing step, the laser spot of the pulsed laser light is moved in the extending direction and the groove width direction of the divided groove, and the pulsed laser light is applied to the surface of the divided groove of the translucent substrate to form the depth of the divided groove. A method of manufacturing a light emitting device that forms a laser mark along a direction . 前記透光性部材は、蛍光体を含有する、請求項８に記載の発光装置の製造方法。 The method for manufacturing a light emitting device according to claim 8 , wherein the translucent member contains a fluorescent substance. 前記透光性部材を準備する工程は、前記透光性部材の上面の形状が、前記発光素子の上面の形状と相似の形状である前記透光性部材を準備する、請求項８または請求項９に記載の発光装置の製造方法。 8 . 9. The method for manufacturing a light emitting device according to 9. １つの前記透光性部材の下面に複数の前記発光素子を接合する、請求項８または請求項９に記載の発光装置の製造方法。 The method for manufacturing a light emitting device according to claim 8 or 9 , wherein a plurality of the light emitting elements are joined to the lower surface of one translucent member. 前記被覆部材を形成する工程は、ポッティングにより行う、請求項８から請求項１１のいずれか一項に記載の発光装置の製造方法。 The method for manufacturing a light emitting device according to any one of claims 8 to 11 , wherein the step of forming the covering member is performed by potting.
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